环境友好型十六烷基三甲基溴化铵基碳量子点荧光探针的制备及用于汞离子高灵敏检测OA

Efficient,environmentally friendly and low-cost detection methods and materials for Hg2+in environmental water bodies were studied.A scheme was proposed to prepare nitrogen-doped carbon dots(CDs)using low-cost cetyltrimethylammonium bromide(CTAB)as the carbon and nitrogen source.In the study,CDs were prepared in one step by hydrothermal synthesis,and only deionized water was used as the solvent without organic solvents.The synthesized CDs were comprehensively characterized,and the results showed that they had good stability,optical properties and surface characteristics.Through performance tests,it was found that the CDs had high selectivity and sensitivity for Hg2+,and their fluorescence was significantly quenched by Hg2+,while other common ions had minimal interference on the detection.The linear response range of the detection was between 0 and 23 μmol/L,and the detection limit could reach 72 nmol/L.In the study,the CDs were used for the quantitative analysis of Hg2+in actual environmental water samples,and the recovery rates of the spiked samples were between 98.80%and 100.20%,with relative standard deviations ranging from 1.28%to 3.19%.